GUESS is a fashion brand founded in 1981 by the Marciano brothers. The brand is known for its trendy and stylish clothing, shoes, and accessories for men, women, and children. GUESS is particularly known for its iconic logo, which features a triangle with a question mark and the logotype inside.
The logotype lettering is set in Times Roman. Linotype's Times Roman and Monotype's Times New Roman are both derived from the same master fonts, but their styles differ slightly. The Guess logotype, for example, has slanted serifs on the letter S instead of vertical serifs of Times New Roman. Times Roman is a widely used typeface and it is supplied with and is installed by default in Apple Mac OS X. You can view more details about the font here.